Interactive device

ABSTRACT

An interactive apparatus  1  which is able to decide on an action pattern in accordance with health conditions of a user without a necessity of putting a biometric sensor on a human body is provided. The interactive apparatus  1  comprises: detection means  50   b  for detecting a health condition of a user; deciding means  50   c  for deciding on an action pattern in accordance with the health condition of the user; execution instructing means  50   g  for instructing execution of the action pattern; offering means  50   e  for making an offer of the action pattern to the user with a speech before instructing execution of the action pattern; and determination means  50   f  for determining whether an answer of the user to the offered action pattern is an answer to accept the offered action pattern or not. The execution instructing means  50   g  instructs execution of the offered action pattern when the answer of the user is determined to be the answer to accept the offered action pattern.

TECHNICAL FIELD

The present invention relates to an interactive apparatus which can have a conversation with a user.

BACKGROUND ART

An audio apparatus which monitors or behavior information for reproducing an audio signal of preference of a sequential habitant at a level adjusted in accordance with the current situation and the physical condition of the user (see, for example, Japanese laid-Open Publication No. 11-221196). The audio apparatus detects the situation of the habitant by using a sensor provided in a room. The audio apparatus monitors identification information and behavior information from a portable transceiver (including a biometric sensor) worn by the habitant, and adjusts the audio signal of the preference of the sequential habitant to a level in accordance with the current situation and the physical condition of the habitant for reproduction.

However, in the conventional art as described in Japanese Laid-Open Publication No. 11-221196, the habitant has to wear a portable transceiver for acquisition of biometric information and the like. Wearing the sensor is cumbersome for the habitant, and thus, this method is inconvenient. There is also a problem that the habitant is monitored all the time by the sensor provided in the room, which may cause uncomfortable feeling of the habitant.

The object of the present invention is to provide an interactive apparatus which is able to decide on an action pattern in accordance with the health conditions of the user without a necessity of putting a biometric sensor on a human body.

DESCRIPTION OF THE INVENTION

An interactive apparatus according to the present invention comprises: detection means for detecting a health condition of a user; deciding means for deciding on an action pattern in accordance with the health condition of the user detected by the detection means; execution instructing means for instructing execution of the action pattern decided by the deciding means; offering means for making an offer of the action pattern to the user with a speech before instructing execution of the action pattern decided by the deciding means; and determination means for determining whether an answer of the user to the offered action pattern is an answer to accept the offered action pattern or not, in which the execution instructing means instructs execution of the offered action pattern when the answer of the user is determined to be the answer to accept the offered action pattern, thereby achieving the above-described object.

The detection means may detect the health condition of the user based on utterance of the user.

The detection means may detect the health condition of the user based on keywords uttered by the user.

Offer necessity determination means for determining whether it is required to make an offer of the action pattern to the user before instructing execution of the action pattern decided by the deciding means may be further included, and the offering means may make an otter of the action pattern to the user with a speech when it is determined that making an offer of the action pattern to the user is required before instructing execution of the action pattern.

The offer necessity determination means may determine necessity of making an offer in accordance with a value of a flag indicating a necessity of making an offer which is previously allocated to the action pattern.

The offer necessity determination means may determine necessity of making an offer based on time distribution of the number of times the action pattern is performed.

The deciding means may decide one of a plurality of action patterns to which priorities are respectively allocated as an action pattern in accordance with the health condition of the user, and may change the priority allocated to the action pattern in accordance with whether or not the action pattern is accepted by the user.

Storage means for storing the action pattern in accordance with the health condition of the user maybe further included, and the deciding means may decide on the action pattern, by using the action pattern stored in the storage means.

The action pattern offered by the offering means to the user may include selecting contents to be reproduced by a reproducing device.

The contents may include audio data, video data, and lighting control data, and the reproducing device may change S at least one of light intensity and color of light of a lighting apparatus based on the lighting control data.

The interactive device may have at least one of an agent function and a traveling function.

The health condition of the user may represent at least one of feelings of the user and a physical condition of the user.

An interactive apparatus according to the present invention comprises: a voice input section for converting a voice produced by the user into a voice signal, a voice recognition action for recognizing words uttered by the user based on the voice signal output from the voice input section; a conversation database in which words expected to be uttered by the user are previously registered, and which stores correspondences between the registered words and the health condition of the user; detection means for detecting the health condition of the user by checking the words recognized by the voice recognition section against the words registered in the conversation database, and deciding on the health condition of the user in accordance with the checking result; deciding means for deciding on an action pattern in accordance with the health condition of the user detected by the detection means based on an action pattern table storing correspondences between the health condition of the user and action patterns of the interactive apparatus; execution instructing means for instructing execution of the action pattern decided by the deciding means; offering means for synthesizing an offering sentence based on an output result of the detection means and an output result of the deciding means and making an offer of the action pattern to the user with a speech before instructing execution of the action pattern decided by the deciding means; and determination means for determining whether an answer of the user to the offered action pattern is an answer to accept the offered action pattern or not, in which the execution instructing means instructs execution of the offered action pattern when the answer of the user is determined to be the answer to accept the offered action pattern, thereby achieving the above-described object.

Means for receiving an action pattern which is counter-offered by the user with respect to the offered action pattern, means for the interactive apparatus to determine whether the counter-offered action pattern is executable or not, and means for updating the correspondences between the health condition of the user and the action patterns of the interactive apparatus which are stored in the action pattern table when the interactive apparatus determines that the counter-offered action pattern is executable may be further included.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram showing an appearance of a robot 1 as an example of an interactive apparatus according to the present invention.

FIG. 2 is a diagram showing an exemplary internal structure of the robot 1.

FIG. 3 is a diagram showing exemplary relationships between keywords to be generated by a user which are stored in a conversation database 140 and the health conditions of the user.

FIG. 4 is a diagram showing exemplary relationships between the health conditions of the user which are stored in an information database 160 and an action pattern of the robot 1.

FIG. 5 is a flow chart showing an exemplary procedure for the robot 1 to detect the health condition of the user and indicate execution of an action pattern which matches the health condition of the user.

FIG. 6 is a diagram showing an exemplary structure of a reproducing apparatus 2100 which allows synchronized reproduction of audio data and/or video data, and lighting control data.

FIG. 7 is a diagram showing an exemplary internal structure of a voice recognition section 40.

FIG. 8 a is a diagram showing an exemplary internal structure of a processing section 50 shown in FIG. 2.

FIG. 8 b is a diagram showing another exemplary internal structure of the processing section 50 shown in FIG. 2.

FIG. 8 c is a diagram showing another exemplary internal structure of the processing section 50 shown in FIG. 2.

FIG. 9 is a diagram for illustrating how offering means 50 e create offering sentences.

FIG. 10 is a diagram showing an exemplary internal structure of offer necessity determination means 50 d.

FIG. 11 is a diagram showing an exemplary structure of an action offer necessity table 162.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the embodiments of the present invention will be described with reference to the drawings.

As used herein, a “health condition of a user” refers to at least one of the feeling or a physical condition of a user. A “user” refers to an owner of the interactive apparatus.

FIG. 1 shows an appearance of a robot 1 as an example of an interactive apparatus according to the present invention. The robot 1 is formed such that it can have conversation with a user.

The robot 1 shown in FIG. 1 includes: a camera 10 which corresponds to an “eye”; a speaker 110 and an antenna 62 which correspond to a “mouth”; a microphone 30 and an antenna 62 which correspond to an “ear”; and movable sections 180 which correspond to a “neck” and an “arm”.

The robot 1 may be an autonomous traveling robot (a mobile robot) having traveling sections 160 which allows it to travel by itself, or may be of a type which cannot be moved by itself.

Any mechanism may be adopted as a mechanism for allowing the robot 1 to travel. For example, the robot 1 may be formed so as to move forward or backward by controlling rotations of rollers provided on hands and feet. Alternatively, the robot 1 may be a mobile robot using tires or legs. The robot 1 may be a human-shaped robot which imitates an animal walking upright with two legs such as human, or may be a pet robot which imitates an animal walking with four legs.

The interactive robot has been illustrated as an example of interactive apparatuses. However, the interactive apparatuses are not limited to this. The interactive apparatuses may be any apparatus formed such that it can have a conversation with users. The interactive apparatuses may be, for example, interactive toys, interactive portable devices (including mobile phones), or interactive agents.

It is preferable that the interactive agents have function of getting around an information space such as Internet, and performing information processing such as search for information, filtering, scheduling and the like on behalf of humans (software agent function). The interactive agents have conversation with humans as if they are humans. Thus, they may be sometimes called anthropomorphic agents.

The interactive apparatuses may have at least one of an agent function and a traveling function.

FIG. 2 shows an exemplary internal structure of the robot 1.

An image recognition section 20 captures image from a camera 10 (image input section), recognizes the captured image, and outputs the recognized result to a processing section 50.

A voice recognition section 40 captures voice from a microphone 30 (voice input section), recognizes the captured voice, and outputs the recognized result to the processing section 50.

FIG. 7 shows an exemplary internal structure of the voice recognition section 40.

The voice input section 30 (microphone) converts voice into a voice signal waveform. The voice signal waveform is output to the voice recognition section 40. The voice recognition section 40 includes voice detection means 71, comparison operation means 72, recognition means 73, and a registered voice database 74.

The voice detection means 71 cuts a part of the voice signal waveform input from the voice input section 30, which satisfies a certain standard, as a voice interval actually produced by a user, and outputs the audio signal waveform in the interval to the comparison operation means 72 as a voice waveform. Herein, a certain standard for cutting out the voice interval may be, for example, that power of the signal waveform in a frequency band of 1 kHz or less, which is generally a voice band of humans, is at a certain level or hither.

In the registered voice database 74, voice waveforms of words which are expected to be uttered by the user and the words are registered with the correspondences therebetween.

The comparison operation means 72 sequentially compares voice waveforms input from the voice detection means 71 with the voice waveforms registered in the registered voice database 74. The comparison operation means 72 calculates the degree of similarity for each of the voice waveforms registered in the registered voice database 74, and outputs the calculated results to the recognition means 73. Herein, a method for comparing two voice waveforms may be a method of comparing totals of differences in power components at respective frequencies after the voice waveform is subjected to frequency analysis such as Fourier transform or the like, or may be a method in which DP matching is performed with an expand and contract in time being taken into account in cepstrum feature quantity or Mel cepstrum feature quantity which is further subjected to polar coordinate transformation after the frequency analysis. Moreover, for efficient comparison operation, the voice waveforms registered in the registered voice database 74 may be comparison factors used in the comparison operation means 72 (for example, power components of the respective frequencies). Further, among the voice waveforms registered in the registered voice database 74, voice waveforms of voice produced unintentionally by the user, for example, cough, groan, and the like are registered, and, as the corresponding words, “unintentional voice production” is registered. Thus, it becomes possible to distinguish between the voice production intended by the user and the voice production which is not intended.

The recognition means 73 detects the voice waveform which has the highest degree of similarity from the degrees of similarities of the respective voice waveforms input from the comparison operation means 72. The recognition means 73 decides the word corresponding to the voice waveform detected from the registered voice database 74 to convert the voice waveform into text, and output the text to the processing section 50. When there is no significant difference among the similarities, it may determine that the input voice is noise and does not perform conversion from the voice waveform into the text. Alternatively, it may convert the voice waveform into the text such as “noise”.

FIG. 8 a shows an exemplary internal structure of the processing section 50 shown in FIG. 2.

The processing section 50 (processing means 50 a) searches a conversation database 140 based on the voice recognition results by the voice recognition section 40, and generates a responding sentence. The responding sentence is output to a speech synthesis section 100. The speech synthesis section 100 synthesizes the responding sentence into a speech. The synthesized speech is output from the audio output section 110 such as a speaker.

In the conversation database 140, patterns of conversation and rules for generating responding sentences. The conversation database 140 further stores the relationships between the words (keywords) uttered by the user and health conditions of the user.

FIG. 3 shows exemplary relationships between the keywords uttered by the user, which are stored in the conversation database 140, and the health conditions of the user.

In the example shown in FIG. 3, the relationships between the keywords uttered by the user and the health conditions of the user are represented in a format of a table. For example, a row in this table indicates that keywords such as “sleepy”, “tired”, and “not feel like eating” correspond to the health condition (physical condition) of the user, “fatigue”. A row 32 of the table shows that keywords such as “yes!” and “great!” correspond to the health condition (feeling) of the user, “pleasure”.

The way to represent the relationships between the keywords uttered by the user and the health conditions of the user is not limited to that shown in FIG. 3. The relationships between the keywords uttered by the user and the health conditions of the user may be represented in any way.

The processing section 50 (detection means 50 b) extracts a keyword from the voice recognition result by the voice recognition section 40, and searches the conversation database 140 using the keyword. Consequently, the processing section 50 (detection means 50 b) detects the health condition of the user from the keyword. For example, when the keyword extracted from the voice recognition result is one of “sleepy”, “tired”, and “not feel like eating”, the processing section 50 (detection means 50 b) determines that the health condition of the user is “fatigue” with reference to the table as shown in FIG. 3.

Instead of or in addition to the above-described method using keywords, the health condition may be detected by detecting the level of the strength or deepness of the voice of the user based on the voice recognition result. For example, when the processing section 50 (detection means 50 b) detects that the level of the strength or deepness of the voice of the user equals to or lower than the predetermined level, the processing section 50 (detection means 50 b) determines that the health condition of the user is “fatigue”.

Further, in addition to the voice recognition result by the voice recognition section 40, the health condition of the user may be detected using the image recognition result by the image recognition section 20. Alternatively, the health condition of the user may be detected by using only the image recognition result by the image recognition section 20. For example, when the processing section 50 (detection means 50 b) detected that the user frequently blinks (or the user yawns), the processing section 50 (detection means 50 b) determines that the health condition of the user is “fatigue”.

As such, the processing section 50 (detection means 50 b) may function as detection means for detecting the health condition of the user based on the utterance of the user or the image recognition result.

An information database 160 stores information such as today's weather and news, knowledge such as various common knowledge, information regarding the user (owner) of the robot 1 (for example information such as sex, age, name, occupation, character, hobby, date of birth, and the like), information regarding the robot 1 (for example, information such as model number, internal structures and the like). The information such as today's weather and news is obtained by, for example, the robot 1 from outside via the sending/receiving section 60 (communication section) and the processing section 50, and stored in the information database 160. Further, the information database 160 stores the relationships between the health conditions of the user and action patterns as an action pattern table 161.

FIG. 4 shows an exemplary action pattern table 161 stored in the information database 160. The action pattern table 161 defines the relationships between the health condition of the user and the robot 1. (

In the example shown in FIG. 4, the health condition of the user and the action pattern of the robot 1 are represented in the format of a table. For example, a row 41 shows that the health condition of the user, “fatigue” corresponds to three kinds of action patterns of the robot 1. Three kinds of action patterns are as follows.

1) Selecting and reproducing contents: Select contents (software) which produce a “healing” or “hypnotic” effect, and reproduce the selected contents (software) with a reproducing device;

2) Preparing a bath: Prepare a bath in order to suggest the user to take a bath;

3) Selecting and preparing a recipe of food or drink: Select a recipe of food or drink which “increases the appetite”, and/or which is “nourishing”, and prepare the food or drink following the selected recipe.

A row 42 in the table shows that the health condition of the user, “pleasure”, correspond to the action pattern of the robot 1, “gesture of ‘banzai’ (raising arms for cheering)”.

The way to represent the relationships between the health conditions of the user and the action patterns of the robot 1 is not limited to that shown in FIG. 4. The relationships between the health conditions of the user and the action patterns of the robot 1 may be represented in any way.

Examples of the action patterns of the robot 1 include: selecting the contents (software) which matches the health condition of the user and reproducing the selected contents (software) with a reproducing device; selecting a recipe of food or drink which matches the health condition of the user and preparing the food or drink following the selected recipe; preparing a bath; and telling joke for getting a laugh.

The processing section 50 (action pattern deciding means 50 c) searches the information database 160 (action pattern table 161) using the health condition of the user detected by searching the conversation database 140 in response to a timing signal t1 output from the detection means 50 b. Consequently, the processing section 50 (the action pattern deciding means 50 c) determines the action pattern of the robot 1 in accordance with the health condition of the user. For example, when the health condition of the user is “fatigue”, the processing section 50 (action pattern deciding means 50 c) determines one of the three action patterns defined in correspondence with “fatigue” as the action pattern of the robot 1 with reference to the table shown in FIG. 4 (action pattern table 161).

Herein, the processing section 50 (action pattern deciding means 50 c) can decide one of three action patterns as the action pattern of the robot 1 in various manner. For example, when priorities may be allocated to three action patterns, the action pattern of the robot 1 may be decided in descending order of priorities. The priorities may be varied depending on the time of the day. For example, the priority of “preparing a bath” may be made to be the highest during the time from 18:00 to 22:00, the priority of “selecting and preparing a recipe of food or drink” may be made to be the highest during 6:00 to 8:00, 11:00 to 13:00, and 17:00 to 19:00, and in other time, the priority of “selecting and reproducing contents” may be made to be the highest.

As described above, the processing section 50 (action pattern deciding means 50 c) functions as deciding means for deciding on the action pattern in accordance with the health condition of the user detected by the detection means 50 b.

The processing section 50 (execution instructing means 50 g) generates a control signal according to the decided action pattern in response to a timing signal t2 output from the action pattern deciding means 50 c, and outputs the control signal to an operation control section 120.

The operation control section 120 drives various actuators 130 in accordance with a control signal output from the processing section 50 (execution instructing means 50 g). Thus, it becomes possible to operate the robot 1 in a desired manner.

For example, when the decided action pattern is the “gesture of ‘banzai’”, the operation control section 120 drives an actuator (a part of the actuator 130) which moves “arms” of the robot 1 up and down in accordance with the control signal output from the processing section 50 (execution instructing means 50 g). When the decided action pattern is “selecting and reproducing contents”, the operation control section 120 may drive an actuator (a part of the actuator 130) for controlling “fingers of hands” of the robot 1 so as to hold a disc and set the held disc in a reproducing device in accordance with the control signal output from the processing section 50 (execution instructing means 50 g). For example, a plurality of discs are arranged and stored in a rack in a predetermined order.

As described above, the processing section 50 (execution instructing means 50 g) functions as execution instructing means for instructing execution of the action pattern decided by the action pattern deciding means 50 c to the operation control section 120.

Alternatively, when the decided action pattern is “preparing a bath”, the processing section 50 (execution instructing means 50 g) may control a remote control section 70 so as to send a remote control signal to a hot-water supply device. The hot-water supply device supplies an appropriate amount of hot-water of a desired temperature (or, supply an appropriate amount of water to a bath tab and then heat the water to the desired temperature) in accordance with a remote control signal. In this case, the processing section 50 (execution instructing means 50 g) functions as instruction indicating means for indicating the execution of the action pattern decided by the action pattern deciding means 50 c to the remote control section 70.

Alternatively, when the decided action pattern is “selecting and reproducing contents”, the processing section 50 (execution instructing means 50 g) may control a remote control section 70 so as to send a remote control signal to a reproducing device. The reproducing device selects the contents from discs set in the reproducing in accordance with the remote control signal for reproduction. If the reproducing device is connected to a disc changer which allows for a plurality of discs to be set, the reproducing device may select the contents from the plurality of discs in accordance with a remote control signal for reproduction. A list for selecting a musical piece including all the musical pieces in a plurality of discs may be stored in a memory in the processing section 50. Alternatively, the reproducing device may read a list for selecting a musical piece of a disc from a header portion of the disc, and then store in a memory in the processing section 50 via the sending and receiving section 60. In such a case, the processing section 50 (execution instructing means 50 g) functions as execution instructing means for instructing execution of the action pattern decided by the action pattern deciding means 50 c to the remote control.

FIG. 8 b shows another exemplary internal structure of the processing section 50 shown in FIG. 2. In the example shown in FIG. 8 b, the processing section 50 (offering means 50 e) makes an offer of the decided action pattern to the user by a speech before it instructs execution of the action pattern. For example, when the decided action pattern is “preparing a bath”, in response to the timing signal t2 output from the action pattern deciding means 50 c, the processing section 50 (offering means 50 e) may generate interrogative sentence (offering sentence) such as “You look tired. Shall I prepare a bath for you?” with reference to the conversation database 140, and output to the speech synthesis section 100. The speech synthesis section 100 synthesizes the interrogative sentence into a speech. The synthesized speech is output from the audio output section 110.

Next, how the offering means 50 e create offering sentences will be described with reference to FIG. 9. The offering means 50 e includes an offering sentence synthesis section therein. The conversation database 140 includes an offering sentence format database therein. In the offering sentence format database, a plurality of offering sentence formats corresponding to a plurality of offer expressions are recorded and stored. Herein, “offer expressions” are words and expressions which indicate a cause (A) which motivates the offer and a response (B) to the cause, such as, “You're A, aren't you? Shall I B?” or “You look A. Can I B?” as shown in FIG. 9, for example.

First, the offering means (offer synthesis section) 50 e selects an offering sentence format which matches the “detected health condition” from the offering sentence format database based on the “detected health condition” input from the detection means 50 b and the “decided action pattern” input from the action pattern deciding means 50 c. Next, the offering means (offer synthesis section) 50 e synthesizes an offering sentence by inserting the “detected health condition” into A in the offering sentence format, and the “decided action pattern” into B. For example when the “detected health condition” is “fatigue”, and the “decided action pattern” is “preparing a bath”, the offering means (offer synthesis section) 50 e synthesizes an offering sentence, “You look tired. Shall I prepare a bath for you?”. The offering sentence is output to the speech synthesis section 100. The speech synthesis section 100 synthesizes the offering sentence into a speech. The synthesized speech is output from the audio output section 110.

As described above, the processing section 50 (offering means 50 e) functions as offering means for making an offer of an action pattern decided by the action pattern deciding means 50 c to the user by a speech before it instructs the execution of the action pattern by using the conversation database (offering sentence format database) 140, the speech synthesis section 100, and the audio output section 110.

The user gives an answer to the offer from the robot 1 whether to accept the offer or not. For example, the user gives an answer such as “yes”, “yeah”, “please do that” and the like as an indication to accept the offer (Yes). Alternatively, the user gives an answer such as “no”, “no, thanks”, “don't need that” and the like as an indication not to accept the offer (No). Such patterns of answers are previously stored in the conversation database 140.

The processing section 50 (offer acceptance determination means 50 f) determines whether the answer of the user is an answer to accept the offer (Yes) or an answer not accept the offer (No) by analyzing the voice recognition result by the voice recognition section 40 with reference to the conversation database 140 in response to a timing signal t5 output from the offering means 50 e.

As described above, the processing section 50 (offer acceptance determination means 50 f functions as offer acceptance determination means for determining whether the answer of the user is an answer to accept the offer (Yes) or an answer not accept the offer (No) by using the voice recognition section 40 and the conversation database 140.

FIG. 8 c shows another exemplary internal structure of the processing section 50 shown in FIG. 2. Whether it is necessary to make the offer of the decided action pattern to the user before execution of the action pattern may be determined. For example, by previously setting an action offer necessity table 162 shown in FIG. 11 where flags indicating necessities of offers are previously allocated to the action patterns in the table shown in FIG. 4, the processing section 50 (offer necessity determination means 50 d) can determine whether the offer is necessary or not in accordance with values of the flags. For example, the processing section 50 (offer necessity determination means 50 d) makes an offer of an action pattern to the user when the value of the flag allocated to the action pattern is “1” before it instructs execution of the action pattern, and does not make an offer of an action pattern to the user when the value of the flag allocated to the action pattern is “0” before it instructs execution of the action pattern.

For example, regarding the action pattern of “preparing a bath”, it is preferable that the offer to the user beforehand is required. Whether or not the user wants to take a bath or not largely depends on the mood at the time of the user. Thus, if the offer to the user beforehand is not required, it may be intrusive. For example, regarding the action pattern of the “gesture of ‘banzai’”, it is preferable that the offer to the user beforehand is not required. If the user is asked for permission every time the banzai gesture is performed, it may look foolish.

As described above, the processing section 50 (offer necessity determination means 50 d) functions as offer necessity determination means for determining whether or not it is necessary to make an offer of the decided action pattern to the user before it instructs execution of the action pattern by using the information database 160 (action offer necessity table 162).

If the time of the day the action pattern is performed is always the same, or the action pattern is frequently performed, it is not desirable to make the offer of the action pattern to the user every time. On the other hand, regarding an action pattern which is not performed usually, it is preferable to confirm whether the user wants execution of the action pattern by making an offer of the action pattern to the user before execution of the action pattern is instructed.

With reference to FIG. 10, the offer necessity determination means 50 d which implements the above-described function will be described. A time distribution record storage section 90 includes a clock time measurement section 91, an integrating section 92, and a time distribution database 93. The offer necessity determination means 50 d includes comparison deciding section therein. The clock time measurement section 91 receives an input of the execution instructing means 50 g, measures the clock time when the action pattern is performed, and outputs to the integrating section 92. The time distribution database 93 records and stores the number of times each of the action patterns is performed at every clock time. The integrating section 92 adds 1 to the number of times recorded in the time distribution database 93 at the measured clock time every time it receives input from the clock time measurement section 91. The time distribution record storage section 90 accumulates history information of action patterns performed at every clock time as such The offer necessity determination means (comparison deciding means) 50 d has pre-set values, and, when it receives an input from the action pattern deciding means 50 c, refers the number of times the action pattern is performed in the past at the clock time (or, in the time period) to the time distribution record storage section 90, and compares with the pre-set value. The comparison deciding section determines that it is necessary to make offer of the action pattern when the number of times the action pattern is performed in the past is smaller than the pre-set value, and determines that it is not necessary to make an offer of the action pattern when the number of times the action pattern is performed in the past is larger than the pre-set value. The determined results is output from the offer necessity determination means 50 d as determination results of the offer necessity determination means 50 d.

As described above, the offer necessity determination means 50 d determines the necessity of flaking offer based on time distribution of the number of times the action pattern is performed.

FIG. 5 shows a procedure of process where the robot 1 detects the health condition of the user and instructs execution of an action pattern which matches the health condition of the user.

Step ST1: The health condition of the user is detected.

For example, the processing section 50 (detection means 50 b) extracts a keyword from the voice recognition result by the voice recognition section 40, and searches the conversation database 140 using the keyword. As a result, the processing section 50 (detection means 50 b) can detect the health condition of the user from the keyword.

Hereinafter, an example of the conversation between the user and the robot 1 is shown. Herein U denotes the utterance by the user, and S denotes to the speech of the robot 1.

U: I'm tired today:

S: Looks like that.

As in this example, when the user utters keywords such as “sleepy”, “tired”, and “not feel like eating”, the processing section 50 (detection means 50 b) determines that the health condition of the user is “fatigue”.

Step ST2: An action pattern is decided in accordance with the health condition of the user detected in step ST1.

For example, the processing section 50 (action pattern deciding means 50 c) searches the information database 160 (action pattern table 161) using the health condition of the user. As a result, the processing section 50 (action pattern deciding means 50 c) can decide the action pattern corresponding to the health condition of the user. It is preferable that the action pattern is previously, set as estimating the demand of the user.

Step ST3: Whether it is necessary to make an offer of the action pattern to the user before the instruction of execution of the action pattern decided in step ST2 is determined by the offer necessity determination means 50 d.

When the determined result in step ST3 is “Yes”, the process goes to step ST4, and, when the determined result in step ST3 is “No”, the process goes to step ST6.

Step ST4: The offer of the action pattern decided in step ST2 is given to the user by the offering means 50 e before the execution of the action pattern is instructed.

Hereinafter, an example of the conversation between the user and the robot 1 is shown. Herein, U denotes the utterance by the user, and S denotes to the speech of the robot 1.

S: You look tired. Shall I reproduce contents (software) having a healing effect?

U: Yeah.

Step ST5: Whether or not the user give an answer to accept the action pattern offered by the robot 1 in step ST4 is determined by the offer acceptance determination means 50 f.

When the determined result in step ST5 is “Yes”, the process goes to step ST6, and, when the determined result in step ST5 is “No”, the process goes to step ST7.

Step ST6: Execution of the action pattern decided in step ST2 is instructed by the execution instructing means 50 g.

Step ST7: The offered action pattern and the fact that the user did not accept (rejected) the offer are stored in the information database 160 as history information.

The history information is referred to from the next time to decide on contents of an action pattern in step ST2 from the next time. The priority allocated to the action pattern which is not accepted by the user can be made lower.

Instead of or in addition to step ST7, in the case where the offer is accepted by the user in step ST5, the offered action pattern and the fact that the user took up (accepted) the offer may be stored in the information database 160 as history information. The history information is referred to from the next time to decide on contents of an action pattern in step ST2. The priority allocated to the action pattern which is accepted by the user can be made higher.

As described above, it is preferable to vary the priorities allocated to action patterns in accordance with whether the offered action patterns are accepted by the user or not. This allows reflecting habits and the like of the user in deciding on the action patterns. As a result, it becomes possible to improve the percentage that the action pattern decided by the robot 1 actually matches the health condition of the user.

The user may make a counteroffer when the user did not accept the offer in step ST5. In such a case, the robot 1 receives the counteroffer and determines whether the counter offer is executable or not. Then it is determined that the counteroffer is executable, the robot 1 updates the relationship between the health condition of the user and the action pattern of the robot 1 stored in the information database 160 (for example, updates the priorities of the action patterns in the table shown in FIG. 4, or, adds new patterns in the table shown in FIG. 4), and then instructs execution of the counteroffer. When it is determined that the counteroffer is not executable, the robot 1 notifies of the user that “the counteroffer cannot be performed”. In this way, by providing the counteroffer from the user, habits and the like of the user can be reflected in deciding on the action patterns. As a result, it becomes possible to improve the percentage that the action pattern decided by the robot 1 actually matches the health condition of the user.

In FIG. 5, step ST3 may be omitted. In such a case, all the action patterns decided in accordance with the health conditions of the user are offered to the user before execution of the action patterns is instructed.

Further, in FIG. 5, steps ST3, ST4, ST5, and ST7 may be omitted. In such a case, all the action patterns decided in accordance with the health condition of the user are instructed to be performed immediately without waiting for an answer from the user.

As described above, according to the present embodiment, the health condition of the user is detected, and the action pattern in accordance with the health condition of the user is decided. Thus, the user can be relieved from a burden of wearing various sensors. Furthermore, the user feels that the robot is an entity that cares about the health condition of the user (good friend).

Further, a system to make an offer of the action pattern to the user before indicating execution of the action pattern may be employed. In such a case, the user has a final decision on whether to accept the offer or not. Thus, the user is not force by the robot to accept the offer, and has a high degree of freedom in judgment. This allows suppressing runaway of the robot, and also for the user to feel familiar to the robot as a user-friendly entity.

According to a survey conducted by JMA Research Institute Inc., the most poplar dream robot imagined by consumers was a “robot pet more like a real pet”. Robots of coexistent or entertainment type closely related humans' lives which share a living space with humans are expected.

It could be understood that the robot as an example of the interactive apparatus according to the present invention is a friendly and useful robot closely related to humans' lives. Such a robot can help the life of the user and may be a good friend of the user.

The contents (software) to be reproduced by the reproducing device may include at least one of video data, audio data, and lighting control data. It is possible to reproduce audio data recorded on a recording medium (such as DVD) in synchronization with reproduction of video data recorded in the recording medium. It is also possible to reproduce lighting control data recorded on a recording medium (such as DVD) in synchronization with reproduction of audio data and/or video data. Such a synchronized reproduction allows to realize contents (software) having a significant “healing” effect and/or “hypnotic” effect.

FIG. 6 shows an exemplary structure of a reproducing apparatus 2100 which allows synchronized reproduction of the audio data and/or video data, and the lighting control data. The reproducing apparatus 2100 is connected to an audio outputting device (for example, a speaker) and a video outputting device (for example, a TV). Thus, the reproducing apparatus 2100 can change a lighting pattern of a lighting apparatus (for example, at least one of light intensity and color of light of the lighting apparatus) in conjunction with music and/or video provided by a recording medium.

The reproducing apparatus 2100 includes a controller 2220, an interface controller (I/F controller) 2230, and a reading out section 2120.

The controller 2220 controls the entire operation of the reproducing apparatus 2100 based on an operation command from the user which is to be input into the I/F controller 2230 or a control signal provided from a decoding section 2140.

The I/F controller 2230 detects an operation by the user (for example, a remote control signal from the remote control section 70 (FIG. 2)), and outputs an operation command corresponding to the operation (for example, a reproduction command) to the controller 2220.

The reading out section 2120 reads out information recorded on a recording medium 2110.

The recording medium 2110 is, typically, a DVD (Digital Versatile Disk). However, the recording medium 2110 is not limited to DVD. The recording medium 2110 may be any type of recording medium. In the following description, an example in which the recording medium 2110 is a DVD will be described. In this case, the reading out section 2120 is, for example, an optical pickup.

As a format for the data recorded in the recording medium 2110, a modified version of a format in conformity with DVD-Image standard is used. Specifically, a format with a lighting pack (L_PCK) newly provided in VOBU is used. Data of L_PCK is data for outputting lighting control data in synchronization with presentation data.

MPEG-2 (Moving Picture Experts Group 2) defines two types of schemes as a scheme for multiplexing any number of encoded streams and reproducing the streams in synchronization in order to be compatible with a wide range of applications. The two types of schemes are a program stream (PS) scheme and a transport stream (TB) scheme. Digital storage media such as DVD employs the program stream (PS) scheme. In the following description, the program stream (PS) scheme defined by MPEG-2 is abbreviated as “MPEG-PS scheme”, and the transport stream (TS) scheme defined by MPEG-2 is abbreviated as “MPEG-TS scheme”.

Each of NV_PCK, A_PCK, V_PCK, and SP_PCK employs a format in conformity with the MPEG-PS scheme. Thus, L_PCK also employs a format in conformity with the MPEG-PS scheme.

The reproducing apparatus 2100 further includes a stream data generation section 2130, and the decoding section 2140.

The stream data generation section 2130 generates stream data including encoded AV data and encoded lighting control data based on the output from the reading out section 2120. Herein, “encoded AV data” refers to data including at least one of encoded audio data and encoded video data.

The strewn data generated by the stream data generation section 2130 has a format in conformity with the MPEG-PS scheme. Such a stream data can be obtained by, for example, receiving information recorded in the DVD 2120 in the form of an RF signal, digitizing and amplifying the RF signal, and performing EFM and demodulation process. The structure of the stream data generation section 2130 may be same as the one known. Thus, detailed description is omitted here.

The decoding section 2140 includes a decomposition section 2150, an AV data decoding section 2160, a lighting control data decoding section 2170, an STC generation section 2180, and a synchronization controller (control section) 2190.

The decomposition section 2150 receives stream data having a format in conformity with the MPEG-PS scheme from the stream data generation section 2130, and decomposes the stream data into encoded AV data and encoded lighting control data. Such decomposition is performed with reference to an identification code in a PES packet header (stream_id). The decomposition section 2150 is, for example, a demultiplexer.

The AV data decoding section 2160 outputs AV data by decoding the encoded AV data. Herein, “AV data” refers to data including at least one of audio data and video data.

The AV data decoding section 2160 includes: a video buffer 2161 for temporarily storing encoded video data which is output from the decomposition section 2150; a video decoder 2162 for outputting video data by decoding the encoded video data; an audio buffer 2163 for temporarily storing encoded audio data which is output from the decomposition section 2150; and an audio decoder 2164 for outputting the audio data by decoding the encoded audio data.

The lighting control data decoding section 2170 outputs the lighting control data by decoding the encoded lighting control data. Herein, “lighting control data” is data for controlling a plurality of pixels included in the lighting apparatus.

The lighting control data decoding section 2170 includes: a lighting control buffer 2171 for temporarily storing the encoded lighting data which is output from the decomposition section 2150; and a lighting decoder 2172 for outputting the lighting control data by decoding the encoded lighting control data.

The STC generation section 2180 generates STC (System Time Clock). STC is obtained by adjusting (increasing or decreasing) a frequency of a reference clock of 27 MHz based on SCR. STC is a reference time used for encoding data which is reproduced when the encoded data is decoded.

The synchronization controller 2190 controls the AV data decoding section 2160 and the lighting control data decoding section 2170 such that the timing for the AV data decoding section 2160 to output AV data and the timing for the lighting control data decoding section 2170 to output the lighting control data are in synchronization.

Controlling such a synchronized reproduction is achieved by, for example, controlling the video decoder 2162 such that an access unit of video data is output from the video decoder 2162 when STC and PTS match, controlling the audio decoder 2164 such that an access unit of video data is output from the audio decoder 2164 when STC and PTS match, and controlling the lighting decoder 2172 such that an access unit of video data is output from the lighting decoder 2172 when STC and PTS match.

The synchronization controller 2190 may control the AV data decoding section 2160 and the lighting control data decoding section 2170 such that the timing for the AV data decoding section 2160 to decode AV data and the timing for the lighting control data decoding section 2170 to decode the lighting control data are in synchronization.

Controlling such a synchronized reproduction is achieved by, for example, controlling the video decoder 2162 such that an access unit of video data is decoded by the video decoder 2162 when STC and DTS match, controlling the audio decoder 2164 such that an access unit of video data is decoded by the audio decoder 2164 when STC and DTS match, and controlling the lighting decoder 2172 such that an access unit of video data is decoded by the lighting decoder 2172 when STC and DTS match.

As described above, in addition to controlling the timing to output access units of video data, audio data, and lighting control data, or, instead of controlling the timing to output access units of video data, audio data, and lighting control data, controlling the timing to decode access units of video data, audio data, and lighting control data may be performed. This is because, sometimes, the timing (order) to output the access units and the timing to decode the access unit are different from each other. Such a control enables synchronized reproduction of video data, audio data, and lighting control data.

The video data output from the video decoder 2162 is output to an external device (for example, TV) via an NTSC encoder 2200. The video decoder 2162 and the TV may be directly connected to each other via an output terminal 2240 of the reproducing apparatus 2100, or may be indirectly connected via a home LAN.

The audio data output from the audio decoder 2164 is output to an external device (for example, speaker) via a digital to analog converter (DAC) 2210. The audio decoder 2164 and the speaker may be directly connected via an output terminal of the reproducing apparatus 2100, or may be indirectly connected via a home LAN.

The lighting control data output from the lighting decoder 2172 is output to an external device (for example, lighting apparatus). The lighting decoder 2172 and the lighting apparatus may be directly connected via an output terminal 2260 of the reproducing apparatus 2100, or may be indirectly connected via a home LAN.

The stream data generated by the stream data generation section 2130 may include encoded sub-video data, or may include navigation data. For example, when the stream data include the encoded sub-video data and the navigation data, the decomposition section 2150 decomposes the stream data into the encoded sub-video data and navigation data. Although not shown in FIG. 6, the decoding section 2140 may further include a navipack circuit, a sub-picture decoder, and a closed caption data decoder. The navipack circuit generates a control signal by processing the navigation data, and outputs the control signal to the controller 2220. The sub-picture decoder decodes the encoded sub-video data and outputs the sub-video data to the NTSC encoder 2200. The closed caption data decoder decodes the encoded closed caption data included in the encoded video data and outputs the closed caption data to the NTSC encoder 2200. Since the functions of these circuits are known and are not related to the subject matter of the present invention, the detailed description thereof is omitted. As described above, decoding section 2140 may include a known structure which is not shown in FIG. 6.

As shown in the above description, according to the reproducing apparatus 2100 shown in FIG. 6, a reproducing apparatus which allows that the lighting control data recorded on a recording medium is reproduced in synchronization with reproduction of the audio data and/or video data recorded on the recording medium. By connecting the audio outputting device (for example, speaker), the video outputting device (for example, TV), and the lighting apparatus to the reproducing apparatus, it becomes possible to change lighting pattern in conjunction with music and/or video provided by the recording medium. Examples of the lighting patterns having a “healing” effect include a lighting pattern representing sunlight passing between tree branches.

INDUSTRIAL APPLICABILITY

As described above, according to interactive apparatus of the present invention, the health condition of the user is detected, and the action pattern in accordance with the health condition of the user is decided. Thus, the user can be relieved from a burden of wearing various sensors. Furthermore, the user feels that the interactive apparatus is an entity that cares about the health condition of the user (good friend). As a result, the value of the interactive apparatus is increased, and satisfaction and a desire for possession of the user toward the interactive apparatus are increased. 

1. An interactive apparatus, comprising: detection means for detecting a health condition of a user; deciding means for deciding on an action pattern in accordance with the health condition of the user detected by the detection means; execution instructing means for instructing execution of the action pattern decided by the deciding means; offering means for making an offer of the action pattern to the user with a speech before instructing execution of the action pattern decided by the deciding means; and determination means for determining whether an answer of the user to the offered action pattern is an answer to accept the offered action pattern or not, wherein the execution instructing means instructs execution of the offered action pattern when the answer of the user is determined to be the answer to accept the offered action pattern.
 2. An interactive apparatus according to claim 1, wherein the detection means detects the health condition of the user based on utterance of the user.
 3. An interactive apparatus according to claim 2, wherein the detection means detects the health condition of the user based on keywords uttered by the user.
 4. An interactive apparatus according to claim 1, further comprising offer necessity determination means for determining whether it is required to make an offer of the action pattern to the user before instructing execution of the action pattern decided by the deciding means, wherein the offering means makes an offer of the action pattern to the user with a speech when it is determined that making an offer of the action pattern to the user is required before instructing execution of the action pattern.
 5. An interactive apparatus according to claim 4, wherein the offer necessity determination means determines necessity of making an offer in accordance with a value of a flag indicating a necessity of making an offer which is previously allocated to the action pattern.
 6. An interactive apparatus according to claim 4, wherein the offer necessity determination means determines necessity of making an offer based on time distribution of the number of times the action pattern is performed.
 7. An interactive apparatus according to claim 1, wherein the deciding means decides one of a plurality of action patterns to which priorities are respectively allocated as an action pattern in accordance with the health condition of the user, and changes the priority allocated to the action pattern in accordance with whether or not the action pattern is accepted by the user.
 8. An interactive apparatus according to claim 1, further comprising storage means for storing the action pattern in accordance with the health condition of the user, wherein the deciding means decides on the action pattern by using the action pattern stored in the storage means.
 9. An interactive apparatus according to claim 1, wherein the action pattern offered by the offering means to the user includes selecting contents to be reproduced by a reproducing device.
 10. An interactive apparatus according to claim 9, wherein the contents include audio data, video data, and lighting control data, and the reproducing device changes at least one of light intensity and color of light of a lighting apparatus based on the lighting control data.
 11. An interactive apparatus according to claim 1, wherein the interactive device has at least one of an agent function and a traveling function.
 12. An interactive apparatus according to claim 1, wherein the health condition of the user represents at least one of feelings of the user and a physical condition of the user.
 13. An interactive apparatus, comprising: a voice input section for converting a voice produced by the user into a voice signal, a voice recognition section for recognizing words uttered by the user based on the voice signal output from the voice input section; a conversation database in which words expected to be uttered by the user are previously registered, and which stores correspondences between the registered words and the health condition of the user; detection means for detecting the health condition of the user by checking the words recognized by the voice recognition section against the words registered in the conversation database, and deciding on the health condition of the user in accordance with the checking result; deciding means for deciding on an action pattern in accordance with the health condition of the user detected by the detection means based on an action pattern table storing correspondences between the health condition of the user and action patterns of the interactive apparatus; execution instructing means for instructing execution of the action pattern decided by the deciding means; offering means for synthesizing an offering sentence based on an output result of the detection means and an output result of the deciding means and making an offer of the action pattern to tile user with a speech before instructing execution of the action pattern decided by the deciding means; and determination means for determining whether an answer of the user to the offered action pattern is an answer to accept the offered action pattern or not, wherein the execution instructing means instructs execution of the offered action pattern when the answer of the user is determined to be the answer to accept the offered action pattern.
 14. An interactive apparatus according to claim 13, further comprising: means for receiving an action pattern which is counter-offered by the user with respect to the offered action pattern; means for the interactive apparatus to determine whether the counter-offered action pattern is executable or not; and means for updating the correspondences between the health condition of the user and the action patterns of the interactive apparatus which are stored in the action pattern table when the interactive apparatus determines that the counter-offered action pattern is executable. 